JP2020529642A - Touch display board and display device - Google Patents

Abstract

A touch display board and a display device are provided. The touch display board includes a plurality of sub-pixel units (10), a data line (20), and a touch signal line (30). For each of the two adjacent rows of sub-pixel units, the sub-pixel unit (10) in one row of sub-pixel units and the sub-pixel unit (10) adjacent to this and located in the other one-row sub-pixel unit. ), The positions of the X sub-pixel units (10) are displaced in the row direction, 0 <X <1, and the two sub-pixel units (10) have different colors. Each sub-pixel unit (10) includes a pixel unit switch (11). Both the data line (20) and the touch signal line (30) are arranged in the gap extending in the row direction between the sub-pixel units (10). The touch signal line (30) is arranged on the same layer as the data line (20) and is insulated from the data line (20). The manufacturing process can be simplified to prevent a short circuit between the touch signal line (30) and the data line (20).

Description

(Cross-reference of related applications)
This application claims the priority of the Chinese patent application of No. 2017106818837.0 filed on August 10, 2017, and cites the full disclosure of the above Chinese patent application as part of this application.

The embodiments of the present disclosure relate to a touch display board and a display device.

The touch display panel is a display device that has both a display and an instruction input function. The user can bring a hand or an object into contact with a touch display panel capable of detecting the touch area, and make a corresponding response according to the detected touch area. Of the many types of touch display panels, the in-cell type touch display panel has the characteristics of being thin and low cost because the touch electrode is embedded inside the display panel, which is favorable to major manufacturers of each panel. It is rare.

In-cell touch type display panels are generally provided with a plurality of touch electrodes inside the display panel in order to satisfy touch accuracy, and each touch electrode needs to be provided with a corresponding touch signal line. , The arrangement method of the touch signal line is complicated and there is still room for improvement.

In the embodiment of the present disclosure, a touch display board is provided. The touch display board is a plurality of sub-pixel units arranged in an array format, and for each of two adjacent sub-pixel units, a sub-pixel unit in one line of sub-pixel units and adjacent sub-pixel units are used. Moreover, the positions of the X sub-pixel units are shifted in the row direction from the sub-pixel units located in the other one-row sub-pixel units, 0 <X <1, and the one-row sub-pixels. An array in which a sub-pixel unit in a unit and a sub-pixel unit adjacent to the sub-pixel unit and located in another row of sub-pixel units have different colors, and each of the sub-pixel units has a pixel unit switch. A plurality of sub-pixel units arranged in a format, data lines arranged in a gap extending in the column direction between the sub-pixel units, and a data line arranged in a gap extending in the row direction between the sub-pixel units. The touch signal line is provided with the touch signal line, and the touch signal line is arranged in the same layer as the data line and is insulated from the data line.

For example, the pixel unit switch includes an active layer having a source region, a drain region, and a channel region located between the source region and the drain region, and the active layer includes the data line and the touch signal line. Located in a layer different from, the source region is electrically connected to the data line via vias, the data line includes a first data line, and the column direction of the first data line portion. The touch signal line is arranged in the gap extending to, the pixel unit switch includes a first pixel unit switch connected to the first end of the first data line, and the touch signal line is the touch. The projection in the direction perpendicular to the display board is located between the source region and the drain region of the first pixel unit switch.

For example, the pixel unit switch includes a second pixel unit switch connected to the second end of the first data line, with the first and second ends on opposite sides of the first data line. The distance between the source region and the drain region of the first pixel unit switch in the row direction is larger than the distance between the source region and the drain region of the second pixel unit switch in the row direction.

For example, the first interval is larger than the second interval, the first interval is the interval in the row direction between the two data lines closest to the one touch signal line, and the second interval. The spacing is the spacing in the row direction between any two adjacent data lines between two adjacent touch signal lines.

For example, the data line further includes a second data line, and the touch signal line is not provided in the gap extending in the column direction of the second data line portion, and the touch signal line is included in one touch signal line. The two closest data lines include one said first data line and one said second data line, and of the two data lines closest to the one touch signal line. The distance in the row direction between the second data line and the touch signal line is equal to the second distance.

For example, each of the sub-pixel units is provided with a pixel unit electrode, the drain region is electrically connected to the pixel unit electrode, and two rows of sub-pixel units closest to one of the first data lines. Within, the distance between the first data line and the pixel unit electrode located at the first end sub-pixel unit in the row direction is the distance between the first data line and the second end sub-pixel unit. The first end and the second end are on opposite sides of the first data line, which is larger than the distance in the row direction from the pixel unit electrode located at, and the first pixel unit switch is the first. It is arranged in the sub-pixel unit located at the first end of the data line.

For example, the active layer has a horizontal portion extending in the row direction, and the touch display substrate further has a gate line provided in a gap extending in the row direction between the subpixel units. The projection of the horizontal portion in the direction perpendicular to the touch display board partially overlaps the projection of the gate line in the direction perpendicular to the touch display board.

For example, the active layer has a vertical portion extending in the row direction, and projection of the vertical portion of the active layer of the first pixel unit switch in a direction perpendicular to the touch display substrate is projected onto the touch display substrate. It is located within the projection of the touch signal line in the vertical direction.

For example, the active layer has a vertical portion extending in the row direction, and projection of the vertical portion of the active layer of the first pixel unit switch in a direction perpendicular to the touch display substrate is projected onto the touch display substrate. It is located within the projection of the first data line in the vertical direction.

For example, the extending direction of the first data line and the extending direction of the touch signal line coincide with each other, and the distance between the first data line and the touch signal line is equal at every place.

For example, the data line of the touch signal line arranged in the gap extending in the column direction includes a bus line and two branch lines both connected to the bus line, and the touch signal line is Located between the two branch lines, one of the two branch lines is connected to the pixel unit switch located at the first end of the touch signal line, and the two branch lines of the two branch lines. The other one is connected to the pixel unit switch located at the second end of the touch signal line, and the first end and the second end are both opposite sides of the touch signal line.

For example, both ends of the two branch lines are connected to each other to form a closed frame structure, the touch signal line is located inside the frame structure, and the bus line is connected to the frame structure. Will be done.

For example, the pixel unit switch is a low temperature polysilicon type thin film transistor.

For example, the data lines are connected to pixel unit switches located on either side of the data line in the row direction and located on sub-pixel units in different rows.

For example, the data line is connected to a pixel unit switch of the sub-pixel unit of the same color.

For example, only the sub-pixel units of two different colors are arranged between any two adjacent data lines.

For example, the sub-pixel units in the two rows of sub-pixel units that separate the one-row sub-pixel units are arranged so as to be aligned in the column direction.

For example, the touch display board of the embodiment of the present disclosure further includes a touch detection electrode, and the touch detection electrode is connected to the touch signal line.

For example, the touch detection electrode further functions as a common electrode layer of the sub-pixel unit.

In the embodiments of the present disclosure, a display device is further provided. The display device further includes the touch display board described above.

In order to more clearly explain the technical proposal of the embodiment of the present disclosure, the drawings of the embodiment of the present disclosure will be briefly described below. It is clear that the drawings described below relate only to some embodiments of the present disclosure and do not limit the present disclosure.

It is a partial plan view of the touch display board provided by the Example of this disclosure. FIG. 1 is a partially enlarged schematic view of FIG. FIG. 2 is a partially enlarged schematic view of FIG. It is sectional drawing which follows the line AA in FIG. 2A. It is another cross-sectional schematic diagram of the touch display board provided by the Example of this disclosure. It is a further sectional schematic view of the touch display board provided by the Example of this disclosure. It is another partial plan view of the touch display board provided by the Example of this disclosure. 6 is a schematic cross-sectional view taken along the line BB in FIG. It is a flow chart of the manufacturing method of the touch display board provided by the Example of this disclosure. It is another flow chart of the manufacturing method of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure. It is a schematic diagram of the manufacturing process of the touch display board provided by the Example of this disclosure.

In order to further clarify the purpose, technical proposal, and advantages of the embodiments of the present disclosure, the technical proposal of the embodiments of the present disclosure will be described clearly and completely by combining drawings. It is clear that the examples described are some of the examples of the present disclosure and not all of them. Based on the embodiments of the present disclosure described, all other embodiments obtained without the creativity of those skilled in the art are all within the scope of this disclosure.

FIG. 1 is a partial plan view of a touch display board provided by an embodiment of the present disclosure. As shown in FIG. 1, the touch display board includes a plurality of sub-pixel units 10 arranged in an array format, a plurality of data lines 20, and a plurality of touch signal lines 30 (only one of them is shown in FIG. 1). (Shown) and a plurality of touch detection electrodes (not shown in FIG. 1).

For example, as shown in FIG. 1, each sub-pixel unit 10 in the sub-pixel unit of each row is arranged in an aligned manner, and each sub-pixel unit in two adjacent rows is a sub-pixel unit in one sub-pixel unit. The positions of the X sub-pixel units 10 are displaced in the row direction between the 10 and the sub-pixel units 10 adjacent to the sub-pixel units and located in the other one-row sub-pixel units, and 0 <X. <1, for example, X may be 0.5. For each of the two adjacent rows of sub-pixel units, the sub-pixel unit 10 in one row of sub-pixel units and the sub-pixel unit 10 adjacent to this and located in another row of sub-pixel units have different colors. Each sub-pixel unit 10 includes a pixel unit switch 11 and a pixel unit electrode 12. Each data line 20 is arranged in a gap extending in the column direction between the sub-pixel units 10. For example, each data line 20 is connected to a pixel unit switch 11 located in a sub-pixel unit 10 in a different row. For example, each data line 20 is connected to a pixel unit switch 11 located on both sides of the data line 20 in the row direction and located in a sub-pixel unit 10 in a different row. Each touch signal line 30 is arranged in a gap extending in the row direction between the sub-pixel units 10. Since the number of touch signal lines 30 is smaller than the number of data lines 20, one touch signal line 30 is not arranged in all the gaps extending in the column direction of each data line 20 portion. In this case, the data line 20 may include the first data line 21 and the second data line 22, and the touch signal line 30 is arranged in the gap extending in the column direction of the first data line 21 portion. The touch signal line 30 is not arranged in the gap extending in the row direction of the second data line 22 portion. The touch signal line 30 is arranged on the same layer as the data line 20 and is insulated from the data line 20.

For example, as shown in FIG. 1, the touch display board has a plurality of gate lines G1, G2 ... Gn, and the plurality of gate lines intersect the plurality of data lines 20 to form a plurality of the above-mentioned gate lines. A sub-pixel unit 10 is defined. For example, each data line is arranged in a gap extending in the row direction between the sub-pixel units, and is connected to the sub-pixel units 10 located in the same row.

For example, the pixel unit switch 11 is a TFT (English name: Thin Film Transistor, Japanese name: thin film transistor). For example, the TFT may have a gate 113 and an active layer, the active layer having a source region 112, a drain region 111, and a channel region 114 located between the source region 112 and the drain region 111. The source region 112 and the drain region 111 may be regions electrically connected to the data line 20 and the pixel unit electrode 12, respectively, and are, for example, regions doped so as to have higher conductivity than the channel region 114. is there. FIG. 2A is a partially enlarged schematic view of FIG. 1 (for convenience of explanation, only parts such as data lines, touch signal lines, active layers, and pixel unit electrodes are shown, and touch electrodes, insulating layers between film layers, and the like are shown. (Other parts are not shown), as shown in FIGS. 1 and 2 (a), the active layer is located in a layer different from the data line 20 and the touch signal line 30, and the source region 112 is a via. It is electrically connected to the data line 20 via 101, and the drain region 111 is electrically connected to the pixel unit electrode 12 via the via 102. For example, the TFT may be a top gate type TFT or a bottom gate type TFT, and the present disclosure does not limit this.

The pixel unit switch 10 includes a first pixel unit switch 11a connected to the first end of the first data line 21 (left side of the first data line 21 as shown in FIG. 2A) and a first pixel unit switch 11. The first and second ends include a second pixel unit switch 11b connected to the second end of the data line 21 (on the right side of the first data line 21 as shown in FIG. 2A). On both opposite sides of the first data line 21, the touch signal line 30 is projected in a direction perpendicular to the touch display substrate between the source region and the drain region of the first pixel unit switch 11a. That is, the projection of the touch signal line 30 on the base substrate 1 is the projection of the source region of the first pixel unit switch 11a on the base substrate 1 and the projection of the drain region of the first pixel unit switch 11a on the base substrate. Located between and.

For example, the distance d _{1 in} the row direction between the source region 112 and the drain region 111 of the first pixel unit switch 11a is the distance d _{1 in} the row direction between the source region 112 and the drain region 111 of the second pixel unit switch 11b. Greater than ₂ . Therefore, the touch signal line 30 can be conveniently arranged.

For example, the TFT may be a low temperature polysilicon type TFT and has more advantages than an amorphous silicon type TFT. FIG. 3 is a schematic cross-sectional view taken along the line AA in FIG. 2A. Combining FIGS. 2 and 3, the TFTs are provided at the gate 113 provided on the base substrate 1 and the gate 113. It includes a gate insulating layer 2 and an active layer provided on the gate insulating layer 2. A silicon oxide or silicon nitride material may be used for the gate insulating layer 2, and the thickness may be 80 to 120 nm. The active layer has a separated drain region 111 and source region 112, and a channel region 114 located between the source region 111 and the drain region 112, and the drain region 111 and the source region 112 on the base substrate 1 have. The positive projection is located outside the positive projection of the gate 113 on the base substrate 1, and the positive projection of the channel region 114 on the base substrate 1 coincides with the positive projection of the gate 113 on the base substrate 1. Since the electron mobility of low-temperature polysilicon is much higher than that of amorphous silicon, the active layer can be made more elongated in the low-temperature polysilicon TFT, and the drain region 111 and the source region 112 of the first pixel unit switch 11a The interval can be extended, which is convenient for arranging the touch signal line 30.

As shown in FIG. 3, the plurality of touch signal lines 30 are arranged in the same layer as the plurality of signal lines 20 and are insulated from each data line 20.

For example, a first insulating layer 3 is provided on a film layer having a TFT, and the material of the first insulating layer 3 may contain a nitride and a non-metal oxide, and the nitride contains SiN _x. The non-metal oxide includes, but is not limited to, SiO _x . The first insulating layer 3 is provided between the film layer having the TFT and the film layer having the plurality of touch signal lines 30 and the plurality of data lines 20. For example, as shown in FIG. 3, the via 101 penetrates the first insulating layer 3.

The plurality of touch detection electrodes 31 are connected to the corresponding touch signal lines 30. For example, the touch detection electrode 31 can be electrically connected to the corresponding touch signal line 30 via the via 103. A second insulating layer 4 can be provided between the film layer having the touch signal line 30 and the film layer having the touch detection electrode 31 to flatten the surface of the film layer. For example, the material of the second insulating layer 4 may be a resin. For example, as shown in FIG. 3, the via 103 penetrates the second insulating layer 4.

For example, a third insulating layer 5 can be provided between the film layer having the touch detection electrode 31 and the film layer having the pixel unit electrode 12, and the material of the third insulating layer 5 is silicon nitride. Often, the thickness of the third insulating layer 5 may be 100 nm to 200 nm. For example, as shown in FIG. 3, the via 102 penetrates the first insulating layer 3, the fourth insulating layer 4, and the fifth insulating layer 5.

Referring to FIG. 2A again, the arbitrary touch signal line 30 is projected in the direction perpendicular to the touch display board between the source region 112 and the drain region 111 of the first pixel unit switch 11a. .. That is, the touch signal line 30 straddles directly above the first pixel unit switch 11a so that a short circuit does not occur between the touch signal line 30 and the data line 20.

As shown in FIG. 2A, the first interval d ₃ is larger than the second interval d ₄ , and the first interval d ₃ is the two data lines 20 closest to the one touch signal line 30. the spacing in the row direction between the second distance d ₄ is the distance in row direction between any two adjacent data lines 20 between the touch signal line 30 of two adjacent .. Since the area between the touch signal line 30 and the first data line 21 does not emit light, the first interval d ₃ is provided larger than the second interval d ₄ , and the touch signal line 30 and the first data line 21 As long as the area between the areas is constant, the area of light emitting can be increased.

For example, in the two rows of sub-pixel units 10 closest to one first data line 21, the first data line 21 and the pixel unit electrode 12 located in the sub-pixel unit 10 at the first end thereof. The distance d ₅ is larger than the distance d ₆ between the first data line 21 and the pixel unit electrode 12 located at the sub pixel unit 10 at the second end, and the first end and the second end are the first data. The opposite sides of the line 21. For example, the first pixel unit switch 11a is arranged in the sub-pixel unit 10 located at the first end of the first data line 121. Since the distance between the first data line 21 and the pixel unit electrodes 12 located on the sub pixel units 10 on both sides thereof is different, it is convenient to provide the touch signal line 30 on the side where the distance is large. The distance between the first data line 21 and the pixel unit electrode 12 refers to the minimum distance between the first data line 21 and the edge of the pixel unit electrode 12 in the row direction.

For example, the two data lines 20 closest to the one touch signal line 30 include one first data line 21 and one second data line 22 and one touch signal line. In the two data lines 20 closest to 30, the distance d _{7 in} the row direction between the second data line 22 and the touch signal line 30 is equal to the second distance d ₄ , so that each sub pixel The light emitting areas of the units can be made equal. The closest proximity means that there is no touch signal line or data line between them. For example, in FIG. 2A, the two data lines 20 closest to the one touch signal line 30 are the first data line 21 on the right side of the touch signal line 30 and the touch signal. It is the first second data line 22 on the left side of the line 30, which has nothing to do with the actual distance.

For example, as shown in FIG. 2A, the active layer has a horizontal portion a extending in the row direction and a vertical portion b extending in the column direction. For example, the projection of the horizontal portion a in the direction perpendicular to the touch display board partially overlaps the projection of the gate line in the direction perpendicular to the touch display substrate, that is, the positive projection of the horizontal portion a on the base substrate 1 is It partially overlaps with the normal projection of the gate wire on the base substrate 1. In this way, a part of the gate line can be directly used as a gate. For example, as shown in FIG. 2A, the projection of the vertical portion b of the active layer of the first pixel unit switch 11a connected to the first data line 21 in the direction perpendicular to the touch display board is It is within the projection of the touch signal line 30 in the direction perpendicular to the touch display board, and its line direction width is equal to the line direction width of the projection of the touch signal line 30 in the direction perpendicular to the touch display board. That is, in the first pixel unit switch 11a connected to the first data line 21, the positive projection of the vertical portion b of the active layer on the base substrate 1 is the positive projection of the touch signal line 30 on the base substrate 1. The width in the row direction of the normal projection of the vertical portion b on the base substrate 1 is equal to the width in the row direction of the normal projection of the touch signal line 30 on the base substrate 1. FIG. 2B is a partially enlarged schematic view 2 of FIG. The difference from FIG. 2A is that in FIG. 2B, the vertical portion b of the active layer of the first pixel unit switch 11a connected to the first data line 21 in the direction perpendicular to the touch display substrate. Is within the projection of the first data line 21 in the direction perpendicular to the touch display board, and its row width is the projection of the first data line 21 in the direction perpendicular to the touch display board. Equal to the width in the row direction. That is, in the first pixel unit switch 11a connected to the first data line 21, the positive projection of the vertical portion b of the active layer on the base substrate 1 is the positive projection of the first data line 21 on the base substrate 1. The width of the vertical portion b in the normal projection in the normal projection on the base substrate 1 is equal to the width in the row direction of the normal projection of one first data line 21 on the base substrate 1. With respect to the structure shown in FIG. 2A, the intervals between the vertical portions b of the active layers of all the pixel unit switches 11 are the same, which is convenient for patterning. With respect to the structure shown in FIG. 2B, since the vertical portions b of the active layers of all the pixel unit switches 11 overlap with the data lines 20, the electrical uniformity of the touch display board can be improved. In the examples of the present disclosure, the positional relationship between the gate line and the active layer is not limited to the situation shown in FIGS. 2 (a) and 2 (b). For example, the gate wire has two locations that overlap the vertical portion b of the active layer, but does not overlap the horizontal portion a, so that a dual gate TFT is formed.

For example, the plurality of touch detection electrodes 31 form a common electrode layer of each sub-pixel unit. In this case, the touch detection electrode 31 further functions as a common electrode layer of the sub-pixel unit 10, which is advantageous in reducing the thickness of the display substrate.

For example, as shown in FIG. 3, the data line 20 and the touch signal line 30 are located between the membrane layer having the active layer 14 and the common electrode layer.

FIG. 4 is a schematic partial cross-sectional view of another touch display board provided by the embodiment of the present disclosure, and the structures of the touch display board shown in FIG. 4 and the touch display board shown in FIG. 3 are basically the same and differ. The point is that the pixel unit electrode 12 of the touch display substrate in FIG. 4 is located below the touch detection electrode 31.

FIG. 5 is a schematic partial cross-sectional view of another touch display board provided by the embodiment of the present disclosure, and the structures of the touch display board shown in FIG. 5 and the touch display board shown in FIG. 3 are basically the same and differ. The point is that in the touch display board shown in FIG. 5, the pixel unit switch is a top gate type TFT.

In the manufacturing process of the top gate type TFT, a light shielding layer facing the channel region 114 is provided between the base substrate 1 and the active layer 114 in order to prevent a light leakage current. In FIG. 5, the light shielding layer is provided. Layers are omitted.

By using the touch signal line and the data line provided in the same layer, the parasitic capacitance between the data line and the touch signal line can be reduced, and the provision of an insulating layer between them can be omitted to simplify the process. Can be done. Insulation between the touch signal line and the data line so that a short circuit does not occur between the touch signal line and the data line.

As shown in FIG. 1, the sub-pixel units 10 in the two rows of sub-pixel units 10 that separate one row of sub-pixel units are arranged so as to be aligned in the column direction, whereby the arrangement of the sub-pixel units 10 is arranged. It can be made more orderly and convenient for manufacturing.

In another embodiment, the fact that each sub-pixel unit 10 in the two rows of sub-pixel units 10 that separates one row of sub-pixel units may be arranged without being aligned in the column direction accommodates different requirements. It is easy to come up with to make it happen. For example, in a triangular touch display board, each sub-pixel unit 10 in two rows of sub-pixel units 10 that separate one row of sub-pixel units gradually reduces the distance between the plurality of sub-pixel units 10 in the column direction. You can do it. For example, in a touch display substrate having other possible shapes including, but not limited to, circular, rhombic, elliptical, and trapezoidal, each sub in two rows of subpixel units 10 that separate one row of subpixel units. The pixel unit 10 may be reduced in the column direction or may exceed the distance of the plurality of sub-pixel units 10, and the pixel units are arranged according to the shape of the display substrate.

In the embodiment of the present disclosure, for example, each row of sub-pixel units 10 has three types of sub-pixel units 10 of different colors, and three types of sub-pixel units 10 arranged in order adjacent to each other have overlapping units. Therefore, in the sub-pixel unit 10 of any row, the overlapping units are overlapped in the row direction. In a non-rectangular touch display board, when it is necessary to reduce the distance between the plurality of sub-pixel units 10, the distance between the sub-pixel units 10 can be reduced by an integral multiple of 3. For a display board containing only two types of sub-pixel units 10 having different colors in the same line, the distance between the sub-pixel units 10 can be reduced by an integral multiple of 2.

For example, since the colors of each sub-pixel unit 10 and each adjacent sub-pixel unit 10 are different, it is convenient to arrange the sub-pixel units 10 when the sub-pixel units 10 of three different colors are included in the same row. Can be done.

For example, only two types of sub-pixel units of different colors are arranged between two arbitrary adjacent data lines 20.

For example, one pixel unit may include six sub-pixel units (six sub-pixel units in the broken line frame in FIG. 1) and display UHD (English name: Ultra High Definition, Japanese name: ultra-high definition). Suitable for manufacturing equipment. The smaller the spacing between adjacent data lines 20, the greater the number of pixel units in a unit area, and by reducing the spacing between adjacent data lines 20, the PPI of the touch display board (English name: English name: Pixels Per Inch, Japanese name: pixel density) can be increased.

For example, each data line 20 is connected to a pixel unit switch 11 of a sub-pixel unit 10 having the same color, whereby column inversion (Color-inversion) can be conveniently performed when displaying a single-color screen.

As shown in FIG. 1, each data line 20 is connected only to the pixel unit switch 11 of the sub-pixel unit 10 having the same color and located on both sides of the data line 20. Therefore, when displaying a single-color screen, it is only necessary to turn on the data line 20 connected to the sub-pixel unit 10 corresponding to the color to be displayed. For example, when displaying a red screen, S1 and All that is required is to turn on the two data lines 20 of S4, which is easy to realize and convenient to operate.

FIG. 6 is another partial structural schematic view of the touch display substrate provided by the embodiment of the present disclosure, and FIG. 7 is a schematic cross-sectional view taken along line BB in FIG. As shown in FIGS. 6 and 7, in the touch display board, the first data line 21 includes a bus line 212 and two branch lines 211 both connected to the bus line 212, and the touch signal line 30 is provided. Is located between the two branch lines 211, one of the two branch lines 211 is connected to the pixel unit switch 11 located at the first end of the touch signal line 30, and the two branch lines 211. The other one is connected to the pixel unit switch 11 located at the second end of the touch signal line 30, and the first end and the second end are opposite sides of the touch signal line 30. By providing the first data line 21 including the two branch lines 211, each one branch line of the two branch lines 211 is connected only to the pixel unit switch 11 at one end of the touch signal line 30. As a result, the intersection of the touch signal line 30 and the pixel unit switch 11 can be avoided.

As shown in FIG. 6, the extension directions of the two branch lines 211 are the same, both ends of the two branch lines 211 are connected to each other to form a closed frame-shaped structure, and the touch signal line 30 is a frame. Located inside the mold structure. Both of the two bus lines 212 are connected to the frame type structure. Since the touch signal line 30 is located inside the frame, it is necessary to open the via and pull out the touch signal line 30.

In the touch display board shown in FIG. 2, where the extension direction of each touch signal line 30 and each data line are the same, and the distance between the data line 20 and the touch signal line 30 which are the closest to the touch signal line 30 is. This also makes it possible to conveniently install the data line 20 and the touch signal line 30, and the charge is accumulated in a part due to the small distance between the data line 20 and a part of the touch signal line 30. Occurrence can be avoided. For example, the stretching direction of the first data line 21 and the stretching direction of the touch signal line 30 coincide with each other, and the distance between the first data line 21 and the touch signal line 30 is equal at every place. In addition, in the touch display board shown in FIG. 2, the data line 20 does not have a branch line, the area of its normal projection on the base board 1 is smaller, which is advantageous for increasing the aperture ratio of the pixel unit and displaying. It is advantageous for reducing the energy consumption of the display board in the situation where the brightness of the boards is the same. The touch display board shown in FIG. 2 has an aperture ratio improved by 20% as compared with the touch display board shown in FIG. 4, and as a result of experiments and tests, the brightness is the same when displaying the same monochrome screen. In this situation, the energy consumption of the touch display board shown in FIG. 2 is about 20% lower than the energy consumption of the touch display board shown in FIG.

In the embodiment of the present disclosure, a display device including any of the touch display boards shown in FIGS. 1 to 7 is further provided. For example, the display device may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, and a navigation system.

By using the touch signal line and the data line provided in the same layer, the parasitic capacitance between the data line and the touch signal line can be reduced, and the provision of an insulating layer between them can be omitted to simplify the process. Can be done. Insulation between the touch signal line and the data line so that a short circuit does not occur between the touch signal line and the data line.

FIG. 8 is a flow chart of a method for manufacturing a touch display board provided by an embodiment of the present disclosure, and the method is applied to manufacturing the touch display board shown in FIGS. 1 to 7. As shown in FIG. 8, the manufacturing method may include the following steps.

S11, a plurality of pixel unit switches are formed on the base substrate.

Each pixel unit switch belongs to a different pixel unit. The pixel units in the sub-pixel units in each row are arranged in an aligned manner, and for each of the two adjacent sub-pixel units, the sub-pixel unit in the sub-pixel unit in one row and the other one row adjacent to the sub-pixel unit are arranged. The positions of the X sub-pixel units are displaced in the row direction from the sub-pixel units located in the sub-pixel units of 0 <X <1, for example, X may be 0.5. .. For each of the two adjacent rows of sub-pixel units, the sub-pixel unit in one row of sub-pixel units and the sub-pixel units adjacent to this and located in the other row of sub-pixel units have different colors. ..

S12, a first insulating layer is formed on a base substrate on which a plurality of pixel unit switches are formed.

S13, a first patterning layer is formed on the first insulating layer.

The first patterning layer has data lines and touch signal lines separated from each other. For example, the data lines are connected to pixel unit switches located in sub-pixel units on different rows. For example, the data lines are connected to pixel unit switches located on either side of the data line in the row direction and located on sub-pixel units in different rows.

S14, a second insulating layer is formed on the first patterning layer.

S15, a pixel unit electrode is formed on the second insulating layer.

All pixel unit electrodes are connected to the pixel unit switch.

By using the touch signal line and the data line provided in the same layer, the parasitic capacitance between the data line and the touch signal line can be reduced, and the provision of an insulating layer between them can be omitted to simplify the process. Can be done. Insulation between the touch signal line and the data line so that a short circuit does not occur between the touch signal line and the data line.

FIG. 9 is another flow chart of the method for manufacturing the touch display board provided by the embodiment of the present disclosure, and the method is also applied to the manufacture of the touch display board shown in FIGS. 1 to 3. Hereinafter, the present production method will be described in detail in combination with FIGS. 10 to 16. As shown in FIG. 9, the manufacturing method may include the following steps.

S21, a TFT is formed on the base substrate.

For example, a top gate type TFT may be formed on the base substrate, or a bottom gate type TFT may be formed. As shown in FIG. 10, a bottom gate type TFT is manufactured on the base substrate 8000, and the TFT has a gate 8113 arranged on the base substrate 8000, a gate insulating layer 8002 arranged on the gate 8113, and a gate insulating layer 8002. The active layer has a separated drain region 8111 and source region 8112, and a channel region 8114 located between the drain region 8111 and the source region 8112, and has a base substrate 8000. The positive projection of the drain region 8111 and the source region 8112 at the base substrate 8000 is located outside the positive projection of the gate 8113 at the base substrate 8000.

The plurality of TFTs are arranged in an array on the base substrate 8000 in order to satisfy the arrangement method of the sub-pixel unit of the touch display substrate to be manufactured.

For example, a low temperature polysilicon type TFT may be used.

A first insulating layer is formed on the base substrate on which S22 and the TFT are formed.

For example, the material of the first insulating layer 8010 may contain a nitride and a non-metal oxide, and the nitride contains SiN _x but is not limited to this, and the non-metal oxide contains SiO _x. Not exclusively.

S23, a first via is manufactured in the first insulating layer.

As shown in FIG. 11, the first via 8011 includes the first insulating layer 8010 so that the data line produced in the subsequent step is electrically connected to the source region 8112 via the first via 8011. It penetrates and is located directly above the source region 8112 of the TFT.

For example, the first via 8011 may be manufactured by performing a patterning step through the first insulating layer 8010.

S24, a first patterning layer is formed on the first insulating layer.

For example, the first patterning layer may also be manufactured by a patterning step.

For example, as shown in FIG. 12, the first patterning layer has a plurality of data lines 8200 and a plurality of touch signal lines 8300, and the touch signal lines 8300 and the data lines 8200 are separated from each other. The data line 8200 is located directly above the first via to penetrate the first via 8011 and electrically connect to the source region 8112 of the TFT.

For example, the data line 8200 and the touch signal line 8300 may be made of a metal material such as metal Al, or may be made of a transparent conductive material such as ITO (English name: Indium tin oxide, Japanese name: indium tin oxide). Good.

When manufacturing the touch display board shown in FIG. 6, the first data line includes a bus line and two branch lines both connected to the bus line, and the touch signal line consists of two branch lines. Located between, one of the two branch lines is connected to the source region of the TFT located at the first end of the touch signal line via the first via, and the other of the two branch lines. One of them is connected to the source region of the TFT located at the second end of the touch signal line via the first via, and the first end and the second end are both opposite sides of the touch signal line.

S25, a second insulating layer is formed on the first patterning layer.

For example, the material of the second insulating layer 8020 may be resin, but is not limited to this.

S26, a second via is manufactured in the second insulating layer.

The method for producing the second via may be the same as the method for producing the first via.

As shown in FIG. 13, the second via 8021 penetrates the second insulating layer 8020 so that the touch detection electrode manufactured in the subsequent step is connected to the touch signal line 8300 via the second via 8021. Then, it is located at a position directly above the touch signal line 8300.

S27, a touch detection electrode is formed on the second insulating layer.

For example, the touch detection electrode may be manufactured by a patterning step.

As shown in FIG. 14, the touch detection electrode 8310 is electrically connected to the touch signal line 8300 via the second via 8021.

For example, the touch detection electrode 8310 may be made of a transparent conductive material such as ITO in order to increase the light transmittance.

S28, A third insulating layer is formed on the base substrate on which the touch detection electrode is formed.

For example, the material of the third insulating layer 8030 may be silicon nitride, and the thickness of the third insulating layer 8030 may be 100 nm to 200 nm.

S29, the third via is manufactured.

As shown in FIG. 15, the third via 8031 is located directly above the drain region 8111 of the TFT so that the pixel unit electrode manufactured in the subsequent step is electrically connected to the drain region 8111. It penetrates the insulating layer 8030, the second insulating layer 8020, and the first insulating layer 8010.

S30, a pixel unit electrode is manufactured on the third insulating layer.

For example, the pixel unit electrode 8120 may be manufactured by a patterning step.

As shown in FIG. 16, the pixel unit electrode 8120 is electrically connected to the drain region 8111 via the third via 8031.

For example, the pixel unit electrode 8120 may be made of a transparent conductive material such as ITO in order to improve the light transmittance.

For example, when the step S23 is executed, a via may be formed at a position of the first insulating layer 8010 directly above the drain region 8111, whereby the data line 8200 and the touch signal may be produced when the step S24 is executed. When the wire 8300 is manufactured, a transfer electrode can be further manufactured in the first insulating layer 8010, and the transfer electrode is electrically connected to the drain region 8111 via a via located directly above the drain region 8111 in the first insulating layer 8010. Be connected. As shown in FIG. 17, by simultaneously manufacturing the via 8031a in step S23 and simultaneously manufacturing the transfer electrode 8031b in step S24, the third via 8031 requiring processing in S29 is the third insulating layer 8030. And only the second insulating layer 8020 can be penetrated, the depth of the third via 8031 is reduced, the processing difficulty is reduced, and the pixel unit electrode 8120 is stably electrically connected to the drain region 8111. To ensure the formation of wires and reduce the possibility of disconnection and poor contact. Further, since the via 8031a can be manufactured at the same time as the first via 8011, the transfer electrode 8131b can be manufactured at the same time as the touch signal line 8300 and the data line 8200, and there is no need to add a separate process step.

FIG. 18 is a further flow chart of a method for manufacturing a touch display board provided by an embodiment of the present disclosure, which method is used for manufacturing the touch display board shown in FIG. 4, and the manufacturing method includes S41 to S50. Of these, steps S41 to S45 are the same as steps S21 to S25 described above, and will not be described again here. Hereinafter, steps S46 to S50 of the method will be described in combination with FIGS. 19 to 21.

S46, a fourth via is manufactured in the second insulating layer.

The method for producing the fourth via 9021 is the same as the method for producing the second via 8021 described above.

As shown in FIG. 19, the fourth via 9021 is located directly above the drain region 9111 of the TFT so that the pixel unit electrode to be manufactured later is electrically connected to the drain region 9111, and the second insulation is provided. It penetrates the layer 9020 and the first insulating layer 8010.

S47, a pixel unit electrode is formed on the second insulating layer.

For example, the pixel unit electrode 9120 may be manufactured by a patterning step.

As shown in FIG. 20, the pixel unit electrode 9120 is electrically connected to the drain region 9111 via the fourth via 9021.

S48, A third insulating layer is formed on the base substrate on which the pixel unit electrodes are formed.

For example, the production of the third insulating layer 9030 will not be described again here because the production of the third insulating layer 8030 can be referred to.

S49, the fifth via is manufactured.

As shown in FIG. 21, the fifth via 9031 is located directly above the touch signal line 9300 so that the touch detection electrode manufactured in the subsequent step can be connected to the touch signal line 9300 via the fifth via 9031. It is manufactured and penetrates the third insulating layer 9030 and the second insulating layer 9020.

S50, a touch detection electrode is manufactured on the third insulating layer.

For example, the touch detection electrode 9030 may be created by a patterning technique.

As shown in FIG. 22, the touch detection electrode 9030 is connected to the touch signal line 9300 via the fifth via 9031.

When manufacturing the touch display substrate shown in FIG. 4, the above-mentioned method of adding a transfer electrode can be similarly used to reduce the possibility of disconnection or poor contact, but this will not be described again here.

The above contents are merely exemplary embodiments of the present disclosure, and do not limit the claims of the present disclosure, and the claims of the present disclosure are determined by the appended claims.

10 Sub-pixel unit 11 Pixel unit switch 20 Data line 30 Touch signal line

Claims (20)

A plurality of sub-pixel units arranged in an array format, for each of two adjacent rows of sub-pixel units, a sub-pixel unit in one row of sub-pixel units and one adjacent and other row of sub-pixel units. The positions of the X sub-pixel units are shifted in the row direction from the sub-pixel units located in the sub-pixel units, 0 <X <1, and the sub-pixel units in one row of sub-pixel units. A plurality of sub-pixel units adjacent to this and located in another row of sub-pixel units have different colors, and each of the sub-pixel units is arranged in an array format including a pixel unit switch. Sub-pixel unit and
Data lines arranged in a gap extending in the column direction between the sub-pixel units,
A touch signal line arranged in a gap extending in the row direction between the sub-pixel units is provided.
A touch display board in which the touch signal line is arranged on the same layer as the data line and is insulated from the data line. The pixel unit switch includes an active layer having a source region, a drain region, and a channel region located between the source region and the drain region, and the active layer includes the data line and the touch signal line. Located in different layers, the source region is electrically connected to the data line via vias.
The data line includes the first data line, and the touch signal line is arranged in a gap extending in the column direction of the first data line portion.
The pixel unit switch includes a first pixel unit switch connected to the first end of the first data line.
The touch display board according to claim 1, wherein the touch signal line is projected in a direction perpendicular to the touch display board between the source region and the drain region of the first pixel unit switch. The pixel unit switch includes a second pixel unit switch connected to the second end of the first data line, the first end and the second end being opposite sides of the first data line.
The second aspect of the present invention, wherein the distance between the source region and the drain region of the first pixel unit switch in the row direction is larger than the distance between the source region and the drain region of the second pixel unit switch in the row direction. Touch display board. The first interval is larger than the second interval, the first interval is the interval in the row direction between the two data lines closest to the one touch signal line, and the second interval. The touch display board according to claim 2, wherein is an interval in the row direction between any two adjacent data lines between two adjacent touch signal lines. The data line further includes a second data line, and the touch signal line is not provided in the gap extending in the column direction of the second data line portion.
The two data lines closest to the one touch signal line include one said first data line and one said second data line, and are closest to the one touch signal line. The touch display board according to claim 4, wherein the distance between the second data line and the touch signal line among two adjacent data lines in the row direction is equal to the second distance. Each of the sub-pixel units includes a pixel unit electrode, and the drain region is electrically connected to the pixel unit electrode.
In the two rows of sub-pixel units closest to the first data line, in the row direction of the first data line and the pixel unit electrodes located at the first end sub-pixel unit. The distance between the first data line and the pixel unit electrode located in the sub-pixel unit at the second end is larger than the distance in the row direction, and the first end and the second end are of the first data line. The touch display board according to claim 2, wherein the first pixel unit switches are arranged on opposite sides of the sub-pixel unit located at the first end of the first data line. The active layer has a horizontal portion extending in the row direction.
The touch display board further has a gate line provided in a gap extending in the row direction between the sub-pixel units.
The touch display board according to claim 2, wherein the projection of the horizontal portion in a direction perpendicular to the touch display board partially overlaps the projection of the gate line in a direction perpendicular to the touch display board. The active layer has a vertical portion extending in the row direction.
Claim that the projection of the vertical portion of the active layer of the first pixel unit switch in the direction perpendicular to the touch display board is located within the projection of the touch signal line in the direction perpendicular to the touch display board. 2. The touch display board according to 2. The active layer has a vertical portion extending in the row direction.
The projection of the vertical portion of the active layer of the first pixel unit switch in the direction perpendicular to the touch display board is located within the projection of the first data line in the direction perpendicular to the touch display board. The touch display board according to claim 2. The second aspect of the present invention, wherein the extending direction of the first data line and the extending direction of the touch signal line are the same, and the distance between the first data line and the touch signal line is equal at every place. Touch display board. The data line of the touch signal line arranged in the gap extending in the row direction includes a bus line and two branch lines both connected to the bus line, and the touch signal line is the above 2 Located between the branch lines, one of the two branch lines is connected to the pixel unit switch located at the first end of the touch signal line, and of the two branch lines. The touch according to claim 1, wherein the other one is connected to the pixel unit switch located at the second end of the touch signal line, and the first end and the second end are opposite sides of the touch signal line. Display board. Both ends of the two branch lines are connected to each other to form a closed frame structure, the touch signal line is located inside the frame structure, and the bus line is connected to the frame structure. The touch display board according to claim 11. The touch display substrate according to any one of claims 1 to 12, wherein the pixel unit switch is a low-temperature polysilicon type thin film transistor. The touch display board according to any one of claims 1 to 12, wherein the data lines are connected to pixel unit switches located on both sides of the data line in the row direction and located in sub-pixel units in different rows. The touch display board according to claim 14, wherein the data lines are connected to a pixel unit switch of the sub-pixel unit having the same color. The touch display board according to any one of claims 1 to 12, wherein only the sub-pixel units having two different colors are arranged between two arbitrary adjacent data lines. The touch display board according to any one of claims 1 to 12, wherein the sub-pixel units in the two rows of sub-pixel units that separate the one-row sub-pixel units are arranged and arranged in the column direction. The touch display board according to any one of claims 1 to 12, further comprising a touch detection electrode, wherein the touch detection electrode is connected to the touch signal line. The touch display substrate according to claim 18, wherein the touch detection electrode further functions as a common electrode layer of the sub-pixel unit. A display device including the touch display board according to any one of claims 1 to 19.

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